#include "afb-hook.h"
#include "verbose.h"
#include "jobs.h"
+#include "uuid.h"
struct afb_evt_watch;
pthread_rwlock_t rwlock;
/* count of reference to the listener */
- int refcount;
+ uint16_t refcount;
};
/*
#endif
/* refcount */
- int refcount;
+ uint16_t refcount;
/* id of the event */
- int id;
+ uint16_t id;
/* has client? */
int has_client;
/** object atached to the event */
struct json_object *object;
+ /** the uuid of the event */
+ uuid_binary_t uuid;
+
+ /** remaining hop */
+ uint8_t hop;
+
/** name of the event to broadcast */
char event[];
};
/* handling id of events */
static pthread_rwlock_t events_rwlock = PTHREAD_RWLOCK_INITIALIZER;
static struct afb_evtid *evtids = NULL;
-static int event_id_counter = 0;
-static int event_id_wrapped = 0;
+static uint16_t event_genid = 0;
+static uint16_t event_count = 0;
+
+/* head of uniqueness of events */
+#if !defined(EVENT_BROADCAST_HOP_MAX)
+# define EVENT_BROADCAST_HOP_MAX 10
+#endif
+#if !defined(EVENT_BROADCAST_MEMORY_COUNT)
+# define EVENT_BROADCAST_MEMORY_COUNT 8
+#endif
+
+#if EVENT_BROADCAST_MEMORY_COUNT
+static struct {
+ pthread_mutex_t mutex;
+ uint8_t base;
+ uint8_t count;
+ uuid_binary_t uuids[EVENT_BROADCAST_MEMORY_COUNT];
+} uniqueness = {
+ .mutex = PTHREAD_MUTEX_INITIALIZER,
+ .base = 0,
+ .count = 0
+};
+#endif
/*
* Create structure for job of broadcasting string 'event' with 'object'
* Returns the created structure or NULL if out of memory
*/
-static struct job_broadcast *make_job_broadcast(const char *event, struct json_object *object)
+static struct job_broadcast *make_job_broadcast(const char *event, struct json_object *object, const uuid_binary_t uuid, uint8_t hop)
{
size_t sz = 1 + strlen(event);
struct job_broadcast *jb = malloc(sz + sizeof *jb);
if (jb) {
jb->object = object;
+ memcpy(jb->uuid, uuid, sizeof jb->uuid);
+ jb->hop = hop;
memcpy(jb->event, event, sz);
}
return jb;
/*
* Broadcasts the 'event' of 'id' with its 'object'
*/
-static void broadcast(const char *event, struct json_object *object)
+static void broadcast(struct job_broadcast *jb)
{
struct afb_evt_listener *listener;
listener = listeners;
while(listener) {
if (listener->itf->broadcast != NULL)
- listener->itf->broadcast(listener->closure, event, json_object_get(object));
+ listener->itf->broadcast(listener->closure, jb->event, json_object_get(jb->object), jb->uuid, jb->hop);
listener = listener->next;
}
pthread_rwlock_unlock(&listeners_rwlock);
struct job_broadcast *jb = closure;
if (signum == 0)
- broadcast(jb->event, jb->object);
+ broadcast(jb);
destroy_job_broadcast(jb);
}
/*
* Broadcasts the string 'event' with its 'object'
*/
-static int unhooked_broadcast(const char *event, struct json_object *object)
+static int unhooked_broadcast(const char *event, struct json_object *object, const uuid_binary_t uuid, uint8_t hop)
{
+ uuid_binary_t local_uuid;
struct job_broadcast *jb;
int rc;
+#if EVENT_BROADCAST_MEMORY_COUNT
+ int iter, count;
+#endif
+
+ /* check if lately sent */
+ if (!uuid) {
+ uuid_new_binary(local_uuid);
+ uuid = local_uuid;
+ hop = EVENT_BROADCAST_HOP_MAX;
+#if EVENT_BROADCAST_MEMORY_COUNT
+ pthread_mutex_lock(&uniqueness.mutex);
+ } else {
+ pthread_mutex_lock(&uniqueness.mutex);
+ iter = (int)uniqueness.base;
+ count = (int)uniqueness.count;
+ while (count) {
+ if (0 == memcmp(uuid, uniqueness.uuids[iter], sizeof(uuid_binary_t))) {
+ pthread_mutex_unlock(&uniqueness.mutex);
+ return 0;
+ }
+ if (++iter == EVENT_BROADCAST_MEMORY_COUNT)
+ iter = 0;
+ count--;
+ }
+ }
+ iter = (int)uniqueness.base;
+ if (uniqueness.count < EVENT_BROADCAST_MEMORY_COUNT)
+ iter += (int)(uniqueness.count++);
+ else if (++uniqueness.base == EVENT_BROADCAST_MEMORY_COUNT)
+ uniqueness.base = 0;
+ memcpy(uniqueness.uuids[iter], uuid, sizeof(uuid_binary_t));
+ pthread_mutex_unlock(&uniqueness.mutex);
+#else
+ }
+#endif
- jb = make_job_broadcast(event, object);
+ /* create the structure for the job */
+ jb = make_job_broadcast(event, object, uuid, hop);
if (jb == NULL) {
ERROR("Cant't create broadcast string job item for %s(%s)",
event, json_object_to_json_string(object));
return -1;
}
+ /* queue the job */
rc = jobs_queue(BROADCAST_JOB_GROUP, 0, broadcast_job, jb);
if (rc) {
ERROR("cant't queue broadcast string job item for %s(%s)",
*/
int afb_evt_evtid_broadcast(struct afb_evtid *evtid, struct json_object *object)
{
- return unhooked_broadcast(evtid->fullname, object);
+ return unhooked_broadcast(evtid->fullname, object, NULL, 0);
}
#if WITH_AFB_HOOK
}
#endif
-/*
- * Broadcasts the 'event' with its 'object'
- * 'object' is released (like json_object_put)
- * Returns the count of listener having receive the event.
- */
-int afb_evt_broadcast(const char *event, struct json_object *object)
+int afb_evt_rebroadcast(const char *event, struct json_object *object, const uuid_binary_t uuid, uint8_t hop)
{
int result;
afb_hook_evt_broadcast_before(event, 0, object);
#endif
- result = unhooked_broadcast(event, object);
+ result = unhooked_broadcast(event, object, uuid, hop);
#if WITH_AFB_HOOK
afb_hook_evt_broadcast_after(event, 0, object, result);
return result;
}
+/*
+ * Broadcasts the 'event' with its 'object'
+ * 'object' is released (like json_object_put)
+ * Returns the count of listener having receive the event.
+ */
+int afb_evt_broadcast(const char *event, struct json_object *object)
+{
+ return afb_evt_rebroadcast(event, object, NULL, 0);
+}
+
/*
* Pushes the event 'evtid' with 'obj' to its listeners
* Returns the count of listener that received the event.
{
size_t len;
struct afb_evtid *evtid, *oevt;
+ uint16_t id;
/* allocates the event */
len = strlen(fullname);
/* allocates the id */
pthread_rwlock_wrlock(&events_rwlock);
+ if (event_count == UINT16_MAX) {
+ pthread_rwlock_unlock(&events_rwlock);
+ free(evtid);
+ ERROR("Can't create more events");
+ return NULL;
+ }
+ event_count++;
do {
- if (++event_id_counter < 0) {
- event_id_wrapped = 1;
- event_id_counter = 1024; /* heuristic: small numbers are not destroyed */
- }
- if (!event_id_wrapped)
- break;
+ /* TODO add a guard (counting number of event created) */
+ id = ++event_genid;
+ if (!id)
+ id = event_genid = 1;
oevt = evtids;
- while(oevt != NULL && oevt->id != event_id_counter)
+ while(oevt != NULL && oevt->id != id)
oevt = oevt->next;
} while (oevt != NULL);
evtid->next = evtids;
evtid->refcount = 1;
evtid->watchs = NULL;
- evtid->id = event_id_counter;
+ evtid->id = id;
evtid->has_client = 0;
pthread_rwlock_init(&evtid->rwlock, NULL);
evtids = evtid;
prv = &evtids;
while (*prv && !(found = (*prv == evtid)))
prv = &(*prv)->next;
- if (found)
+ if (found) {
*prv = evtid->next;
+ event_count--;
+ }
pthread_rwlock_unlock(&events_rwlock);
/* destroys the event */
/*
* Returns the id of the 'event'
*/
-int afb_evt_evtid_id(struct afb_evtid *evtid)
+uint16_t afb_evt_evtid_id(struct afb_evtid *evtid)
{
return evtid->id;
}
return -1;
}
+/*
+ * Avoids the 'listener' to watch 'eventid'
+ * Returns 0 in case of success or else -1.
+ */
+int afb_evt_watch_sub_eventid(struct afb_evt_listener *listener, uint16_t eventid)
+{
+ struct afb_evt_watch *watch;
+ struct afb_evtid *evtid;
+
+ /* search the existing watch */
+ pthread_rwlock_wrlock(&listener->rwlock);
+ watch = listener->watchs;
+ while(watch != NULL) {
+ evtid = watch->evtid;
+ if (evtid->id == eventid) {
+ if (watch->activity != 0) {
+ watch->activity--;
+ if (watch->activity == 0 && listener->itf->remove != NULL)
+ listener->itf->remove(listener->closure, evtid->fullname, evtid->id);
+ }
+ pthread_rwlock_unlock(&listener->rwlock);
+ return 0;
+ }
+ watch = watch->next_by_listener;
+ }
+ pthread_rwlock_unlock(&listener->rwlock);
+ errno = ENOENT;
+ return -1;
+}
+
#if WITH_AFB_HOOK
/*
* update the hooks for events
/*
* Returns the id of the 'eventid'
*/
-int afb_evt_event_x2_id(struct afb_event_x2 *eventid)
+uint16_t afb_evt_event_x2_id(struct afb_event_x2 *eventid)
{
struct afb_evtid *evtid = afb_evt_event_x2_to_evtid(eventid);
return evtid ? evtid->id : 0;
Code Review / src / app-framework-binder.git / blobdiff